1-8   Introduction to HP PCL EN
Use these three rules to combine and shorten printer commands:
1 The first two characters after “?” (the parameterized and group 
character) must be the same in all of the commands to be 
combined. In the example above, these are “
&” and “l”.
2 All alphabetic characters within the combined printer command 
are lower-case, except the final letter which is always upper-case. 
In the combined example above, “O” becomes “o”. The final 
character in the printer command must always be upper-case to 
let the printer know that the command is complete.
3 The printer commands are performed in the order that they are 
combined (from left to right). Be sure to combine commands in 
the order that they are to be performed.